Chessboard

Time limit1sMemory limit1024 MB

Summary

Given a number n from 1 to 64, print the chessboard square that Sasha numbered n, with rows numbered top to bottom.

Level: Easy1 of 10
Topics: Implementation
Solved: No attempts yet

Problem

Sasha numbered the squares of a chessboard, starting from the bottom-left square a1. She numbered the rows from top to bottom, and within each row from left to right. Her numbering is shown below.

Given the number of a square, print which square received that number.

Input

A single integer $n$ from 1 to 64 is given.

Output

Print the square that received the number $n$ .

Examples1

Example 1
Input
```
1
```
Expected output
```
a1
```